Paul Gascoigne has left Glasgow Rangers to join Middlesbrough for £3.4m.

He will go to the Riverside on a three-and-a-half-year deal, and could make his debut against Chelsea on Sunday in the Coca Cola Cup Final.

The transfer is subject to Gascoigne passing a medical.

Mel Stein, Gascoigne's agent, said the player had made his decision after a day of talks with his current club, Glasgow Rangers.

"He is very sad to be leaving Rangers. It is an enormous wrench. But now he is looking forward to Middlesbrough, the cup final and the promotion push.

The England midfielder will miss out on Rangers' bid to win a 10th successive Scottish title this season.

Mr Stein refused to confirm the financial details of the transfer, but confirmed the length of the contract. He said the Middlesbrough manager Brian Robson had been very influential in persuading Gazza to go back to the North East.

"I think everyone is going to be pleased to see him back in English football."

Mr Robson beat off competition for Gascoigne from Premiership club Crystal Palace, who had also agreed a £3m fee.

Mr Robson said: "I'm delighted Gazza is joining us. He's a great player and our fans will be really excited about watching him play.

"He'll travel down tomorrow from Scotland and join the lads in training. He'll go for his medical in the next few days."